I've been recently trying to use PayPal to accept guest payments from people that do not have PayPal accounts on my store.
In my Account Settings -> Website Preferences -> I have optional account enabled. But it seems that I'm still not getting the guest payment option on the checkout.
And 90% of the times when I try to access my website preferences, I get an error saying "Sorry, we are not able to process your request. Please try again later."
Back-story: I discovered that PayPal offers guest payment options after I was randomly trying to make a test payment with PayPal, and the credit card option got shown, and I actually paid from my own card into my own PayPal account and it worked. After that incident, I never got the option again, and I've been trying to get it back permanently but I can't also seem to access my website preferences.